How Sewage Gas lamps worked

JE Webb of Birmingham invented the Sewage Gas Destructor Lamps for places which had pockets of gas, often at the top of hills

Burning mantles created intense 700F heat in the lamp-hood, drawing up sewer gases

As the gases passed through the lamp into the air, smells and bacteria were destroyed by the heat

Sheffield has four gas-powered lamps, which will remain so after their restoration

Nicola Wray, of Historic England, said: "These lamps are notable survivals of a type of street furniture which were once common, but are increasingly rare.

"Combining them with sewer vents was an ingenious way of safely disposing of sewer gases which could otherwise lead to explosions."

Image copyrightGeograph/Martin SpeckImage caption
The lamps are across the city, many in hilly areas including on Mulehouse Road in Crookes, Brincliffe Edge Road in Nether Edge, Upper Albert Road in Meersbrook and Burnaby Crescent in Walkley

Image copyrightGeograph/Stephen RichardsImage caption
All working Gas Destructor Lamps were converted to mains gas over 20 years ago. Four in Sheffield are gas and the others are being electrified

Some lamps, now more than 100 years old, have been vandalised or have lost parts over time, and will get new lanterns and arms.

They will be repainted and powered by solar power LED lights to replicate the original lighting.

The work is due to be finished by December.

Councillor Bryan Lodge said: "The lamps provide a nostalgic reminder of days gone by and remain lasting landmarks of Sheffield's celebrated heritage."